Store the values of the $element variable in the sandbox to let it survive to...

Store the values of the $element variable in the sandbox to let it survive to the next iteration of the upgrade function Closes #3436569

resolved all threads

Haven't tested, but those changes make sense.

This was indeed tricky, because there's iteration over all webforms, and over all submissions. I tried to base the batch on submissions and dynamically re-fill them during the batch processing. But you're right, re-filling should not be done with multiple webforms at a time.

Re-producing would involve a webform with less than <batch_size> submissions.

approved this merge request

Thanks for the feedback. I will do the merge

merged